templatelist.java

来自「java jdk 1.4的源码」· Java 代码 · 共 958 行 · 第 1/2 页

      break;
    case DTM.ENTITY_REFERENCE_NODE :
    case DTM.ENTITY_NODE :
      head = (TemplateSubPatternAssociation) m_patternTable.get(
        dtm.getNodeName(targetNode)); // %REVIEW% I think this is right
      break;
    case DTM.PROCESSING_INSTRUCTION_NODE :
      head = (TemplateSubPatternAssociation) m_patternTable.get(
        dtm.getLocalName(targetNode));
      break;
    case DTM.COMMENT_NODE :
      head = m_commentPatterns;
      break;
    case DTM.DOCUMENT_NODE :
    case DTM.DOCUMENT_FRAGMENT_NODE :
      head = m_docPatterns;
      break;
    case DTM.NOTATION_NODE :
    default :
      head = (TemplateSubPatternAssociation) m_patternTable.get(
        dtm.getNodeName(targetNode)); // %REVIEW% I think this is right
    }

    return (null == head) ? m_wildCardPatterns : head;
  }
  
  /**
   * Given a target element, find the template that best
   * matches in the given XSL document, according
   * to the rules specified in the xsl draft.  This variation of getTemplate 
   * assumes the current node and current expression node have already been 
   * pushed. 
   *
   * @param xctxt
   * @param targetNode
   * @param mode A string indicating the display mode.
   * @param maxImportLevel The maximum importCountComposed that we should consider or -1
   *        if we should consider all import levels.  This is used by apply-imports to
   *        access templates that have been overridden.
   * @param quietConflictWarnings
   * @return Rule that best matches targetElem.
   * @throws XSLProcessorException thrown if the active ProblemListener and XPathContext decide
   * the error condition is severe enough to halt processing.
   *
   * @throws TransformerException
   */
  public ElemTemplate getTemplateFast(XPathContext xctxt,
                                int targetNode,
                                int expTypeID,
                                QName mode,
                                int maxImportLevel,
                                boolean quietConflictWarnings,
                                DTM dtm)
            throws TransformerException
  {
    
    TemplateSubPatternAssociation head;

    switch (dtm.getNodeType(targetNode))
    {
    case DTM.ELEMENT_NODE :
    case DTM.ATTRIBUTE_NODE :
      head = (TemplateSubPatternAssociation) m_patternTable.get(
        dtm.getLocalNameFromExpandedNameID(expTypeID));
      break;
    case DTM.TEXT_NODE :
    case DTM.CDATA_SECTION_NODE :
      head = m_textPatterns;
      break;
    case DTM.ENTITY_REFERENCE_NODE :
    case DTM.ENTITY_NODE :
      head = (TemplateSubPatternAssociation) m_patternTable.get(
        dtm.getNodeName(targetNode)); // %REVIEW% I think this is right
      break;
    case DTM.PROCESSING_INSTRUCTION_NODE :
      head = (TemplateSubPatternAssociation) m_patternTable.get(
        dtm.getLocalName(targetNode));
      break;
    case DTM.COMMENT_NODE :
      head = m_commentPatterns;
      break;
    case DTM.DOCUMENT_NODE :
    case DTM.DOCUMENT_FRAGMENT_NODE :
      head = m_docPatterns;
      break;
    case DTM.NOTATION_NODE :
    default :
      head = (TemplateSubPatternAssociation) m_patternTable.get(
        dtm.getNodeName(targetNode)); // %REVIEW% I think this is right
    }

    if(null == head)
    {
      head = m_wildCardPatterns;
      if(null == head)
        return null;
    }                                              

    // XSLT functions, such as xsl:key, need to be able to get to 
    // current ElemTemplateElement via a cast to the prefix resolver.
    // Setting this fixes bug idkey03.
    xctxt.pushNamespaceContextNull();
    try
    {
      do
      {
        if ( (maxImportLevel > -1) && (head.getImportLevel() > maxImportLevel) )
        {
          continue;
        }
        ElemTemplate template = head.getTemplate();        
        xctxt.setNamespaceContext(template);
        
        if ((head.m_stepPattern.execute(xctxt, targetNode, dtm, expTypeID) != NodeTest.SCORE_NONE)
                && head.matchMode(mode))
        {
          if (quietConflictWarnings)
            checkConflicts(head, xctxt, targetNode, mode);

          return template;
        }
      }
      while (null != (head = head.getNext()));
    }
    finally
    {
      xctxt.popNamespaceContext();
    }

    return null;
  }  // end findTemplate

  /**
   * Given a target element, find the template that best
   * matches in the given XSL document, according
   * to the rules specified in the xsl draft.
   *
   * @param xctxt
   * @param targetNode
   * @param mode A string indicating the display mode.
   * @param quietConflictWarnings
   * @return Rule that best matches targetElem.
   * @throws XSLProcessorException thrown if the active ProblemListener and XPathContext decide
   * the error condition is severe enough to halt processing.
   *
   * @throws TransformerException
   */
  public ElemTemplate getTemplate(XPathContext xctxt,
                                int targetNode,
                                QName mode,
                                boolean quietConflictWarnings,
                                DTM dtm)
            throws TransformerException
  {

    TemplateSubPatternAssociation head = getHead(xctxt, targetNode, dtm);

    if (null != head)
    {
      // XSLT functions, such as xsl:key, need to be able to get to 
      // current ElemTemplateElement via a cast to the prefix resolver.
      // Setting this fixes bug idkey03.
      xctxt.pushNamespaceContextNull();
      xctxt.pushCurrentNodeAndExpression(targetNode, targetNode);
      try
      {
        do
        {
          ElemTemplate template = head.getTemplate();        
          xctxt.setNamespaceContext(template);
          
          if ((head.m_stepPattern.execute(xctxt, targetNode) != NodeTest.SCORE_NONE)
                  && head.matchMode(mode))
          {
            if (quietConflictWarnings)
              checkConflicts(head, xctxt, targetNode, mode);

            return template;
          }
        }
        while (null != (head = head.getNext()));
      }
      finally
      {
        xctxt.popCurrentNodeAndExpression();
        xctxt.popNamespaceContext();
      }
    }

    return null;
  }  // end findTemplate
  
  /**
   * Given a target element, find the template that best
   * matches in the given XSL document, according
   * to the rules specified in the xsl draft.
   *
   * @param xctxt
   * @param targetNode
   * @param mode A string indicating the display mode.
   * @param maxImportLevel The maximum importCountComposed that we should consider or -1
   *        if we should consider all import levels.  This is used by apply-imports to
   *        access templates that have been overridden.
   * @param maxEndImportLevel The count of composed imports
   * @param quietConflictWarnings
   * @return Rule that best matches targetElem.
   * @throws XSLProcessorException thrown if the active ProblemListener and XPathContext decide
   * the error condition is severe enough to halt processing.
   *
   * @throws TransformerException
   */
  public ElemTemplate getTemplate(XPathContext xctxt,
                                int targetNode,
                                QName mode,
                                int maxImportLevel, int endImportLevel,
                                boolean quietConflictWarnings,
                                DTM dtm)
            throws TransformerException
  {

    TemplateSubPatternAssociation head = getHead(xctxt, targetNode, dtm);

    if (null != head)
    {
      // XSLT functions, such as xsl:key, need to be able to get to 
      // current ElemTemplateElement via a cast to the prefix resolver.
      // Setting this fixes bug idkey03.
      xctxt.pushNamespaceContextNull();
      xctxt.pushCurrentNodeAndExpression(targetNode, targetNode);
      try
      {
        do
        {
          if ( (maxImportLevel > -1) && (head.getImportLevel() > maxImportLevel))
          {
            continue;
          }
          if (head.getImportLevel()<= maxImportLevel - endImportLevel)
            return null;
          ElemTemplate template = head.getTemplate();        
          xctxt.setNamespaceContext(template);
          
          if ((head.m_stepPattern.execute(xctxt, targetNode) != NodeTest.SCORE_NONE)
                  && head.matchMode(mode))
          {
            if (quietConflictWarnings)
              checkConflicts(head, xctxt, targetNode, mode);

            return template;
          }
        }
        while (null != (head = head.getNext()));
      }
      finally
      {
        xctxt.popCurrentNodeAndExpression();
        xctxt.popNamespaceContext();
      }
    }

    return null;
  }  // end findTemplate

  /**
   * Get a TemplateWalker for use by a compiler.  See the documentation for
   * the TreeWalker inner class for further details.
   */
  public TemplateWalker getWalker()
  {
    return new TemplateWalker();
  }

  /**
   * Check for match conflicts, and warn the stylesheet author.
   *
   * @param head Template pattern
   * @param xctxt Current XPath context
   * @param targetNode Node matching the pattern
   * @param mode reference, which may be null, to the <a href="http://www.w3.org/TR/xslt#modes">current mode</a>.
   */
  private void checkConflicts(TemplateSubPatternAssociation head,
                              XPathContext xctxt, int targetNode, QName mode)
  {

    // TODO: Check for conflicts.
  }

  /**
   * Add object to vector if not already there.
   *
   * @param obj
   * @param v
   */
  private void addObjectIfNotFound(Object obj, Vector v)
  {

    int n = v.size();
    boolean addIt = true;

    for (int i = 0; i < n; i++)
    {
      if (v.elementAt(i) == obj)
      {
        addIt = false;

        break;
      }
    }

    if (addIt)
    {
      v.addElement(obj);
    }
  }

  /**
   * Keyed on string macro names, and holding values
   * that are macro elements in the XSL DOM tree.
   * Initialized in initMacroLookupTable, and used in
   * findNamedTemplate.
   * @serial
   */
  private Hashtable m_namedTemplates = new Hashtable(89);

  /**
   * This table is keyed on the target elements
   * of patterns, and contains linked lists of
   * the actual patterns that match the target element
   * to some degree of specifity.
   * @serial
   */
  private Hashtable m_patternTable = new Hashtable(89);

  /** Wildcard patterns.
   *  @serial          */
  private TemplateSubPatternAssociation m_wildCardPatterns = null;

  /** Text Patterns.
   *  @serial          */
  private TemplateSubPatternAssociation m_textPatterns = null;

  /** Root document Patterns.
   *  @serial          */
  private TemplateSubPatternAssociation m_docPatterns = null;

  /** Comment Patterns.
   *  @serial          */
  private TemplateSubPatternAssociation m_commentPatterns = null;

  /**
   * Get table of named Templates.
   * These are keyed on template names, and holding values
   * that are template elements.
   *
   * @return A Hashtable dictionary that contains {@link java.lang.String}s 
   * as the keys, and {@link org.apache.xalan.templates.ElemTemplate}s as the 
   * values. 
   */
  private Hashtable getNamedTemplates()
  {
    return m_namedTemplates;
  }

  /**
   * Set table of named Templates.
   * These are keyed on string macro names, and holding values
   * that are template elements in the XSL DOM tree.
   *
   * @param v Hashtable dictionary that contains {@link java.lang.String}s 
   * as the keys, and {@link org.apache.xalan.templates.ElemTemplate}s as the 
   * values.
   */
  private void setNamedTemplates(Hashtable v)
  {
    m_namedTemplates = v;
  }

  /**
   * Get the head of the assocation list that is keyed by target.
   *
   * @param key The name of a node. 
   *
   * @return The head of a linked list that contains all possible match pattern to 
   * template associations for the given key.
   */
  private TemplateSubPatternAssociation getHead(String key)
  {
    return (TemplateSubPatternAssociation) m_patternTable.get(key);
  }

  /**
   * Get the head of the assocation list that is keyed by target.
   *
   * @param key
   * @param assoc
   */
  private void putHead(String key, TemplateSubPatternAssociation assoc)
  {

    if (key.equals(PsuedoNames.PSEUDONAME_TEXT))
      m_textPatterns = assoc;
    else if (key.equals(PsuedoNames.PSEUDONAME_ROOT))
      m_docPatterns = assoc;
    else if (key.equals(PsuedoNames.PSEUDONAME_COMMENT))
      m_commentPatterns = assoc;

    m_patternTable.put(key, assoc);
  }

  /**
   * An inner class used by a compiler to iterate over all of the ElemTemplates
   * stored in this TemplateList.  The compiler can replace returned templates
   * with their compiled equivalent.
   */
  public class TemplateWalker
  {
    private Enumeration hashIterator;
    private boolean inPatterns;
    private TemplateSubPatternAssociation curPattern;

    private Hashtable m_compilerCache = new Hashtable();

    private TemplateWalker()
    {
      hashIterator = m_patternTable.elements();
      inPatterns = true;
      curPattern = null;
    }

    public ElemTemplate next()
    {

      ElemTemplate retValue = null;
      ElemTemplate ct;

      while (true)
      {
        if (inPatterns)
        {
          if (null != curPattern)
            curPattern = curPattern.getNext();

          if (null != curPattern)
            retValue = curPattern.getTemplate();
          else
          {
            if (hashIterator.hasMoreElements())
            {
              curPattern = (TemplateSubPatternAssociation) hashIterator.nextElement();
              retValue =  curPattern.getTemplate();
            }
            else
            {
              inPatterns = false;
              hashIterator = m_namedTemplates.elements();
            }
          }
        }

        if (!inPatterns)
        {
          if (hashIterator.hasMoreElements())
            retValue = (ElemTemplate) hashIterator.nextElement();
          else
            return null;
        }

        ct = (ElemTemplate) m_compilerCache.get(new Integer(retValue.getUid()));
        if (null == ct)
        {
          m_compilerCache.put(new Integer(retValue.getUid()), retValue);
          return retValue;
        }
      }
    }
  }

}